I rarely give straight dry food on the days when I feed dry. I sometimes add half a tin of sardines (if in brine drain the brine as that's a lot of salt); sometimes half a small banana, or some frozen peas, or mixed frozen veg, slightly thawed; or finely grated carrot, zucchini (courgette), diced bell pepper, bits of pear or apple (no seeds), fresh berries, a bit of fresh meat like boiled chicken or minced beef (drain off the fat). Maybe some leftovers depending. Cooked veg too.
My two love bell pepper slices as treats and they are kind of nice for dog breath!
Dried tripe is smelly but they are mad for it -- a very healthy treat but then decrease food accordingly as you should with any treats, though veggies/fruit are pretty low cal.
If the vet is happy with her weight I wouldn't worry; it is more important that she's a healthy puppy than any particular size; she is going to be whatever size she is going to be! :lol: They definitely grow in sudden spurts after initially adding steady weight. They can fill out still up til 18 months and sometimes longer. Mine are both slow developers -- Jaspar is only now losing his puppy coat at two years!! but he has been the same weight for 6 months or more now.
www.sitstay.com sells some really nice/healthy treats but they can be expensive! I think mine are just as happy with a bit of crunchy bell pepper as they are with salmon jerky, or other quite costly things...
I think a lot of those treats are more for the people than the dogs... mine got more excited about a rotting piece of fish that fell from someone's trash and has been lying in the street the last couple of days than they do about any of the upmarket treats in nice packages... :lol: Oh the joys of urban living.